#define triggerPin 13
#define echoPin 12
#define ledPin 2
#define speakerPin 10
#define pitch 262
double duration, distance;

void setup() {
  // put your setup code here, to run once:
  pinMode(triggerPin, OUTPUT);
  pinMode(echoPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  pinMode(speakerPin, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  

}